<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 添加角色 -->
      <el-row>
        <el-col><el-button type="primary">添加角色</el-button></el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList">
        <el-table-column type="expand">
          <!-- 展开列 -->
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', 'vcenter', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeById(scope.row, item1.id)">{{
                  item1.authName
                }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限 s三级权限-->
              <el-col :span="19">
                <!-- 渲染二级权限 -->
                <el-row
                  :class="['vcenter', i2 === 0 ? '' : 'bttop']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  closable
                  @close="removeById(scope.row, item1.id)"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      type="success"
                      @close="removeById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i
                  ></el-col>
                  <el-col :span="18">
                    <!-- 渲染三级权限 -->
                    <el-tag
                      type="warning"
                      closable
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      @close="removeById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      //定义角色列表
      rolesList: [],
      setRightDialogVisible: false,
      rightsList: [],
      treeProps: { label: 'authName', children: 'children' },
      defKeys: [],
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('请求出错')
      this.rolesList = res.data
    },
    async removeById(role, rightId) {
      //弹框是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((error) => error)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}+/rights/${rightId}`
      )
      if (res.meta.status !== 200) return this.$message.error('删除失败')
      role.children = res.data
    },
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('请求失败')
      this.rightsList = res.data
      console.log(this.rightsList)
      //递归获取三级节点
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    //递归获取三级权限的id 传入defKeys
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => {
        this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getCheckedNodes(),
      ]
      const idStr = keys.join(',') 
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.bttop {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>